vmparam.h revision 1.24 1 1.24 simonb /* $NetBSD: vmparam.h,v 1.24 2000/12/12 23:46:22 simonb Exp $ */
2 1.7 cgd
3 1.1 cgd /*
4 1.1 cgd * Copyright (c) 1988 University of Utah.
5 1.6 mycroft * Copyright (c) 1982, 1986, 1990, 1993
6 1.6 mycroft * The Regents of the University of California. All rights reserved.
7 1.1 cgd *
8 1.1 cgd * This code is derived from software contributed to Berkeley by
9 1.1 cgd * the Systems Programming Group of the University of Utah Computer
10 1.1 cgd * Science Department.
11 1.1 cgd *
12 1.1 cgd * Redistribution and use in source and binary forms, with or without
13 1.1 cgd * modification, are permitted provided that the following conditions
14 1.1 cgd * are met:
15 1.1 cgd * 1. Redistributions of source code must retain the above copyright
16 1.1 cgd * notice, this list of conditions and the following disclaimer.
17 1.1 cgd * 2. Redistributions in binary form must reproduce the above copyright
18 1.1 cgd * notice, this list of conditions and the following disclaimer in the
19 1.1 cgd * documentation and/or other materials provided with the distribution.
20 1.1 cgd * 3. All advertising materials mentioning features or use of this software
21 1.1 cgd * must display the following acknowledgement:
22 1.1 cgd * This product includes software developed by the University of
23 1.1 cgd * California, Berkeley and its contributors.
24 1.1 cgd * 4. Neither the name of the University nor the names of its contributors
25 1.1 cgd * may be used to endorse or promote products derived from this software
26 1.1 cgd * without specific prior written permission.
27 1.1 cgd *
28 1.1 cgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 1.1 cgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 1.1 cgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 1.1 cgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 1.1 cgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 1.1 cgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 1.1 cgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 1.1 cgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 1.1 cgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 1.1 cgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 1.1 cgd * SUCH DAMAGE.
39 1.1 cgd *
40 1.6 mycroft * from: Utah $Hdr: vmparam.h 1.16 91/01/18$
41 1.6 mycroft *
42 1.7 cgd * @(#)vmparam.h 8.2 (Berkeley) 4/19/94
43 1.1 cgd */
44 1.1 cgd
45 1.13 thorpej #ifndef _HP300_VMPARAM_H_
46 1.13 thorpej #define _HP300_VMPARAM_H_
47 1.13 thorpej
48 1.1 cgd /*
49 1.1 cgd * Machine dependent constants for HP300
50 1.1 cgd */
51 1.22 thorpej
52 1.22 thorpej /*
53 1.22 thorpej * We use 4K pages on the hp300. Override the PAGE_* definitions
54 1.22 thorpej * to be compile-time constants.
55 1.22 thorpej */
56 1.22 thorpej #define PAGE_SHIFT 12
57 1.22 thorpej #define PAGE_SIZE (1 << PAGE_SHIFT)
58 1.22 thorpej #define PAGE_MASK (PAGE_SIZE - 1)
59 1.13 thorpej
60 1.1 cgd /*
61 1.1 cgd * USRTEXT is the start of the user text/data space, while USRSTACK
62 1.1 cgd * is the top (end) of the user stack. LOWPAGES and HIGHPAGES are
63 1.1 cgd * the number of pages from the beginning of the P0 region to the
64 1.1 cgd * beginning of the text and from the beginning of the P1 region to the
65 1.1 cgd * beginning of the stack respectively.
66 1.1 cgd *
67 1.1 cgd * NOTE: the ONLY reason that HIGHPAGES is 0x100 instead of UPAGES (3)
68 1.1 cgd * is for HPUX compatibility. Why?? Because HPUX's debuggers
69 1.1 cgd * have the user's stack hard-wired at FFF00000 for post-mortems,
70 1.1 cgd * and we must be compatible...
71 1.1 cgd */
72 1.10 thorpej #define USRTEXT 8192 /* Must equal __LDPGSZ */
73 1.1 cgd #define USRSTACK (-HIGHPAGES*NBPG) /* Start of user stack */
74 1.1 cgd #define BTOPUSRSTACK (0x100000-HIGHPAGES) /* btop(USRSTACK) */
75 1.1 cgd #define P1PAGES 0x100000
76 1.1 cgd #define LOWPAGES 0
77 1.1 cgd #define HIGHPAGES (0x100000/NBPG)
78 1.1 cgd
79 1.1 cgd /*
80 1.1 cgd * Virtual memory related constants, all in bytes
81 1.1 cgd */
82 1.1 cgd #ifndef MAXTSIZ
83 1.6 mycroft #define MAXTSIZ (8*1024*1024) /* max text size */
84 1.1 cgd #endif
85 1.1 cgd #ifndef DFLDSIZ
86 1.24 simonb #define DFLDSIZ (32*1024*1024) /* initial data size limit */
87 1.1 cgd #endif
88 1.1 cgd #ifndef MAXDSIZ
89 1.6 mycroft #define MAXDSIZ (64*1024*1024) /* max data size */
90 1.1 cgd #endif
91 1.1 cgd #ifndef DFLSSIZ
92 1.1 cgd #define DFLSSIZ (512*1024) /* initial stack size limit */
93 1.1 cgd #endif
94 1.1 cgd #ifndef MAXSSIZ
95 1.1 cgd #define MAXSSIZ MAXDSIZ /* max stack size */
96 1.1 cgd #endif
97 1.1 cgd
98 1.1 cgd /*
99 1.1 cgd * Sizes of the system and user portions of the system page table.
100 1.1 cgd */
101 1.1 cgd /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */
102 1.1 cgd #define SYSPTSIZE (2 * NPTEPG) /* 8mb */
103 1.1 cgd #define USRPTSIZE (1 * NPTEPG) /* 4mb */
104 1.1 cgd
105 1.1 cgd /*
106 1.1 cgd * PTEs for mapping user space into the kernel for phyio operations.
107 1.1 cgd * One page is enough to handle 4Mb of simultaneous raw IO operations.
108 1.1 cgd */
109 1.1 cgd #ifndef USRIOSIZE
110 1.1 cgd #define USRIOSIZE (1 * NPTEPG) /* 4mb */
111 1.1 cgd #endif
112 1.1 cgd
113 1.1 cgd /*
114 1.1 cgd * PTEs for system V style shared memory.
115 1.1 cgd * This is basically slop for kmempt which we actually allocate (malloc) from.
116 1.1 cgd */
117 1.1 cgd #ifndef SHMMAXPGS
118 1.1 cgd #define SHMMAXPGS 1024 /* 4mb */
119 1.1 cgd #endif
120 1.1 cgd
121 1.1 cgd /*
122 1.1 cgd * External IO space map size.
123 1.1 cgd * By default we make it large enough to map up to 3 DIO-II devices and
124 1.1 cgd * the complete DIO space. For a 320-only configuration (which has no
125 1.1 cgd * DIO-II) you could define a considerably smaller region.
126 1.1 cgd */
127 1.1 cgd #ifndef EIOMAPSIZE
128 1.1 cgd #define EIOMAPSIZE 3584 /* 14mb */
129 1.1 cgd #endif
130 1.1 cgd
131 1.1 cgd /*
132 1.1 cgd * The time for a process to be blocked before being very swappable.
133 1.1 cgd * This is a number of seconds which the system takes as being a non-trivial
134 1.1 cgd * amount of real time. You probably shouldn't change this;
135 1.1 cgd * it is used in subtle ways (fractions and multiples of it are, that is, like
136 1.1 cgd * half of a ``long time'', almost a long time, etc.)
137 1.1 cgd * It is related to human patience and other factors which don't really
138 1.1 cgd * change over time.
139 1.1 cgd */
140 1.1 cgd #define MAXSLP 20
141 1.1 cgd
142 1.1 cgd /*
143 1.1 cgd * Mach derived constants
144 1.1 cgd */
145 1.1 cgd
146 1.1 cgd /* user/kernel map constants */
147 1.16 kleink #define VM_MIN_ADDRESS ((vaddr_t)0)
148 1.16 kleink #define VM_MAXUSER_ADDRESS ((vaddr_t)0xFFF00000)
149 1.16 kleink #define VM_MAX_ADDRESS ((vaddr_t)0xFFF00000)
150 1.16 kleink #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0)
151 1.16 kleink #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xFFFFF000)
152 1.1 cgd
153 1.1 cgd /* virtual sizes (bytes) for various kernel submaps */
154 1.19 ragge #define VM_PHYS_SIZE (USRIOSIZE*NBPG)
155 1.1 cgd
156 1.1 cgd /* # of kernel PT pages (initial only, can grow dynamically) */
157 1.16 kleink #define VM_KERNEL_PT_PAGES ((vsize_t)2) /* XXX: SYSPTSIZE */
158 1.13 thorpej
159 1.13 thorpej /*
160 1.13 thorpej * Constants which control the way the VM system deals with memory segments.
161 1.13 thorpej * The hp300 only has one physical memory segment.
162 1.13 thorpej */
163 1.13 thorpej #define VM_PHYSSEG_MAX 1
164 1.13 thorpej #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH
165 1.13 thorpej #define VM_PHYSSEG_NOADD
166 1.15 thorpej
167 1.15 thorpej #define VM_NFREELIST 1
168 1.15 thorpej #define VM_FREELIST_DEFAULT 0
169 1.13 thorpej
170 1.13 thorpej /*
171 1.13 thorpej * pmap-specific data stored in the vm_physmem[] array.
172 1.13 thorpej */
173 1.13 thorpej struct pmap_physseg {
174 1.13 thorpej struct pv_entry *pvent; /* pv table for this seg */
175 1.13 thorpej char *attrs; /* page attributes for this seg */
176 1.13 thorpej };
177 1.13 thorpej
178 1.13 thorpej #endif /* _HP300_VMPARAM_H_ */
179